Excuse me, is there an immigration supervisor in the United States? What is it like?

Immigration supervision has two meanings:

One refers to the time you have to live in another country in order to retain your immigration status.

The other refers to the time you have to live in order to become a citizen. Immigration prisons are often nicknamed "immigrant prisoners". In fact, an immigration prison is not a prison, and sitting in an immigration prison does not put you in prison. It is only because it restricts the freedom of immigrants to a certain extent that it is called this name.

American immigration supervisor

Simply put, if you have an American green card (equivalent to a Canadian maple leaf card), you must land in the United States every 180 days, and you can apply for American citizenship after living in the United States for three years within five years, that is, you can cancel immigration supervision.